/*
 * Copyright (C) 2008 ZXing authors
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.wm.machine.baselibrary.utils.zxing.app;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.Result;
import com.google.zxing.ResultMetadataType;
import com.google.zxing.ResultPoint;
import com.wm.machine.baselibrary.R;
import com.wm.machine.baselibrary.utils.zxing.camera.CameraManager;
import com.wm.machine.baselibrary.utils.zxing.decode.CaptureActivityHandler;
import com.wm.machine.baselibrary.utils.zxing.decode.DecodeFormatManager;
import com.wm.machine.baselibrary.utils.zxing.decode.DecodeHintManager;
import com.wm.machine.baselibrary.utils.zxing.decode.FinishListener;
import com.wm.machine.baselibrary.utils.zxing.decode.InactivityTimer;
import com.wm.machine.baselibrary.utils.zxing.decode.Intents;
import com.wm.machine.baselibrary.utils.zxing.manager.AmbientLightManager;
import com.wm.machine.baselibrary.utils.zxing.manager.BeepManager;
import com.wm.machine.baselibrary.utils.zxing.manager.DecodeControlUtil;
import com.wm.machine.baselibrary.utils.zxing.result.ResultHandler;
import com.wm.machine.baselibrary.utils.zxing.result.ResultHandlerFactory;
import com.wm.machine.baselibrary.utils.zxing.utils.Contents;
import com.wm.machine.baselibrary.utils.zxing.view.ViewfinderView;

import java.io.IOException;
import java.text.DateFormat;
import java.util.Collection;
import java.util.EnumSet;
import java.util.Map;

/**
 * This activity opens the camera and does the actual scanning on a background thread. It draws a
 * viewfinder to help the user place the barcode correctly, shows feedback as the image processing
 * is happening, and then overlays the results when a scan is successful.
 *
 * @author dswitkin@google.com (Daniel Switkin)
 * @author Sean Owen
 */
public final class CaptureActivity extends Activity
    implements
      SurfaceHolder.Callback,
      View.OnClickListener {

  private static final String TAG = CaptureActivity.class.getSimpleName();

  private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;
  private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;
  // 相册选择code
  private static final int REQUEST_CODE = 210;
  private static final Collection<ResultMetadataType> DISPLAYABLE_METADATA_TYPES =
      EnumSet.of(ResultMetadataType.ISSUE_NUMBER, ResultMetadataType.SUGGESTED_PRICE,
          ResultMetadataType.ERROR_CORRECTION_LEVEL, ResultMetadataType.POSSIBLE_COUNTRY);
  private CameraManager cameraManager;
  private CaptureActivityHandler handler;
  private Result savedResultToShow;
  private ViewfinderView viewfinderView;
  private boolean hasSurface;
  private IntentSource source;
  private String sourceUrl;
  private Collection<BarcodeFormat> decodeFormats;
  private Map<DecodeHintType, ?> decodeHints;
  private String characterSet;
  private InactivityTimer inactivityTimer;
  private BeepManager beepManager;
  private AmbientLightManager ambientLightManager;
  private Button mBtnPhoto, mBtnLight;
  // 选择图片的路径
  private String photoPath;
  private boolean openLight;

  public ViewfinderView getViewfinderView() {
    return viewfinderView;
  }

  public Handler getHandler() {
    return handler;
  }

  public CameraManager getCameraManager() {
    return cameraManager;
  }

  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);

    Window window = getWindow();
    window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    setContentView(R.layout.activiyt_capture);

    hasSurface = false;
    inactivityTimer = new InactivityTimer(this);
    beepManager = new BeepManager(this);
    ambientLightManager = new AmbientLightManager(this);
    openLight = false;
  }

  @Override
  protected void onResume() {
    super.onResume();

    // CameraManager must be initialized here, not in onCreate(). This is necessary because we don't
    // want to open the camera driver and measure the screen size if we're going to show the help on
    // first launch. That led to bugs where the scanning rectangle was the wrong size and partially
    // off screen.
    cameraManager = new CameraManager(getApplication());
    viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
    viewfinderView.setCameraManager(cameraManager);

    handler = null;
    // lastResult = null;

    // if (DecodeControlUtil.isDisableAutoOrientation()) {
    // setRequestedOrientation(getCurrentOrientation());
    // } else {
    // setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
    // }

    beepManager.updatePrefs();
    ambientLightManager.start(cameraManager);
    inactivityTimer.onResume();

    Intent intent = getIntent();
    source = IntentSource.NONE;
    sourceUrl = null;
    decodeFormats = null;
    characterSet = null;

    if (intent != null) {
      String action = intent.getAction();
      if (Intents.Scan.ACTION.equals(action)) {

        // Scan the formats the intent requested, and return the result to the calling activity.
        source = IntentSource.NATIVE_APP_INTENT;
        decodeFormats = DecodeFormatManager.parseDecodeFormats(intent);
        decodeHints = DecodeHintManager.parseDecodeHints(intent);

        if (intent.hasExtra(Intents.Scan.WIDTH) && intent.hasExtra(Intents.Scan.HEIGHT)) {
          int width = intent.getIntExtra(Intents.Scan.WIDTH, 0);
          int height = intent.getIntExtra(Intents.Scan.HEIGHT, 0);
          if (width > 0 && height > 0) {
            cameraManager.setManualFramingRect(width, height);
          }
        }

        if (intent.hasExtra(Intents.Scan.CAMERA_ID)) {
          int cameraId = intent.getIntExtra(Intents.Scan.CAMERA_ID, -1);
          if (cameraId >= 0) {
            cameraManager.setManualCameraId(cameraId);
          }
        }
      }

      SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
      mBtnPhoto = (Button) findViewById(R.id.photo_btn);
      mBtnLight = (Button) findViewById(R.id.flash_btn);
      mBtnPhoto.setOnClickListener(this);
      mBtnLight.setOnClickListener(this);
      SurfaceHolder surfaceHolder = surfaceView.getHolder();
      if (hasSurface) {
        // The activity was paused but not stopped, so the surface still exists. Therefore
        // surfaceCreated() won't be called, so init the camera here.
        initCamera(surfaceHolder);
      } else {
        // Install the callback and wait for surfaceCreated() to init the camera.
        surfaceHolder.addCallback(this);
      }
    }
  }

  private int getCurrentOrientation() {
    int rotation = getWindowManager().getDefaultDisplay().getRotation();
    if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
      switch (rotation) {
        case Surface.ROTATION_0:
        case Surface.ROTATION_90:
          return ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
        default:
          return ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
      }
    } else {
      switch (rotation) {
        case Surface.ROTATION_0:
        case Surface.ROTATION_270:
          return ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
        default:
          return ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
      }
    }
  }

  @Override
  protected void onPause() {
    if (handler != null) {
      handler.quitSynchronously();
      handler = null;
    }
    inactivityTimer.onPause();
    ambientLightManager.stop();
    beepManager.close();
    cameraManager.closeDriver();
    if (!hasSurface) {
      SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
      SurfaceHolder surfaceHolder = surfaceView.getHolder();
      surfaceHolder.removeCallback(this);
    }
    super.onPause();
  }

  @Override
  protected void onDestroy() {
    inactivityTimer.shutdown();
    super.onDestroy();
  }

  @Override
  public void onClick(View v) {
    int i = v.getId();
    if (i == R.id.photo_btn) {
      selectPhoto();

    } else if (i == R.id.flash_btn) {
      openLight = !openLight;
      cameraManager.setTorch(openLight);

    } else {
    }
  }

  /**
   * 相册选择图片
   */
  private void selectPhoto() {
    Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT"
    innerIntent.setType("image/*");
    Intent wrapperIntent = Intent.createChooser(innerIntent, "选择二维码图片");
    startActivityForResult(wrapperIntent, REQUEST_CODE);
  }

  private void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) {
    // Bitmap isn't used yet -- will be used soon
    if (handler == null) {
      savedResultToShow = result;
    } else {
      if (result != null) {
        savedResultToShow = result;
      }
      if (savedResultToShow != null) {
        Message message = Message.obtain(handler, R.id.decode_succeeded, savedResultToShow);
        handler.sendMessage(message);
      }
      savedResultToShow = null;
    }
  }

  @Override
  public void surfaceCreated(SurfaceHolder holder) {
    if (holder == null) {
      Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
    }
    if (!hasSurface) {
      hasSurface = true;
      initCamera(holder);
    }
  }

  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {
    hasSurface = false;
  }

  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    // do nothing
  }

  /**
   * A valid barcode has been found, so give an indication of success and show the results.
   *
   * @param rawResult The contents of the barcode.
   * @param scaleFactor amount by which thumbnail was scaled
   * @param barcode A greyscale bitmap of the camera data which was decoded.
   */
  public void handleDecode(Result rawResult, Bitmap barcode, float scaleFactor) {
    inactivityTimer.onActivity();
    // lastResult = rawResult;
    ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);

    boolean fromLiveScan = barcode != null;
    if (fromLiveScan) {
      // Then not from history, so beep/vibrate and we have an image to draw on
      beepManager.playBeepSoundAndVibrate();
      drawResultPoints(barcode, scaleFactor, rawResult);
    }

    switch (source) {
      case NATIVE_APP_INTENT:
      case PRODUCT_SEARCH_LINK:
        handleDecodeExternally(rawResult, resultHandler, barcode);
        break;
      case ZXING_LINK:
        handleDecodeInternally(rawResult, resultHandler, barcode);
        break;
      case NONE:
        if (fromLiveScan && DecodeControlUtil.isBulkMode()) {
          // 批量扫描
          restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
        } else {
          // handleDecodeInternally(rawResult, resultHandler, barcode);
          String resultString = rawResult.getText();
          Intent data = new Intent();
          data.putExtra(Contents.SCAN_RESULT, resultString);
          setResult(RESULT_OK, data);
          finish();
        }
        break;
      default:
        break;
    }
  }

  /**
   * Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
   *
   * @param barcode A bitmap of the captured image.
   * @param scaleFactor amount by which thumbnail was scaled
   * @param rawResult The decoded results which contains the points to draw.
   */
  private void drawResultPoints(Bitmap barcode, float scaleFactor, Result rawResult) {
    ResultPoint[] points = rawResult.getResultPoints();
    if (points != null && points.length > 0) {
      Canvas canvas = new Canvas(barcode);
      Paint paint = new Paint();
      paint.setColor(getResources().getColor(R.color.result_points));
      if (points.length == 2) {
        paint.setStrokeWidth(4.0f);
        drawLine(canvas, paint, points[0], points[1], scaleFactor);
      } else if (points.length == 4
              && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
              || rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
        // Hacky special case -- draw two lines, for the barcode and metadata
        drawLine(canvas, paint, points[0], points[1], scaleFactor);
        drawLine(canvas, paint, points[2], points[3], scaleFactor);
      } else {
        paint.setStrokeWidth(10.0f);
        for (ResultPoint point : points) {
          if (point != null) {
            canvas.drawPoint(scaleFactor * point.getX(), scaleFactor * point.getY(), paint);
          }
        }
      }
    }
  }

  private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b,
      float scaleFactor) {
    if (a != null && b != null) {
      canvas.drawLine(scaleFactor * a.getX(),
          scaleFactor * a.getY(),
          scaleFactor * b.getX(),
          scaleFactor * b.getY(),
          paint);
    }
  }

  // Put up our own UI for how to handle the decoded contents.
  private void handleDecodeInternally(Result rawResult, ResultHandler resultHandler,
      Bitmap barcode) {

    if (resultHandler.getDefaultButtonID() != null) {
      resultHandler.handleButtonPress(resultHandler.getDefaultButtonID());
      return;
    }
    String fromat = rawResult.getBarcodeFormat().toString(); // 格式
    String type = resultHandler.getType().toString(); // 类型
    DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
    String time = formatter.format(rawResult.getTimestamp()); // 时间戳
    Map<ResultMetadataType, Object> metadata = rawResult.getResultMetadata();
    StringBuilder metadataText = new StringBuilder(20); // 元数据
    if (metadata != null) {
      for (Map.Entry<ResultMetadataType, Object> entry : metadata.entrySet()) {
        if (DISPLAYABLE_METADATA_TYPES.contains(entry.getKey())) {
          metadataText.append(entry.getValue()).append('\n');
        }
      }
      if (metadataText.length() > 0) {
        metadataText.setLength(metadataText.length() - 1);
      }
    }
    CharSequence displayContents = resultHandler.getDisplayContents(); // 内容信息

    Log.e(TAG, "---编码格式---" + fromat + "--类型--" + type + "--时间戳--" + time + "--元数据--" + metadataText
        + "--内容信息--" + displayContents);
  }

  // Briefly show the contents of the barcode, then handle the result outside Barcode Scanner.
  private void handleDecodeExternally(Result rawResult, ResultHandler resultHandler,
      Bitmap barcode) {

    if (barcode != null) {
      viewfinderView.drawResultBitmap(barcode);
    }

    long resultDurationMS;
    if (getIntent() == null) {
      resultDurationMS = DEFAULT_INTENT_RESULT_DURATION_MS;
    } else {
      resultDurationMS = getIntent().getLongExtra(Intents.Scan.RESULT_DISPLAY_DURATION_MS,
              DEFAULT_INTENT_RESULT_DURATION_MS);
    }

    if (resultDurationMS > 0) {
      String rawResultString = String.valueOf(rawResult);
      if (rawResultString.length() > 32) {
        rawResultString = rawResultString.substring(0, 32) + " ...";
      }
    }

    switch (source) {
      case NATIVE_APP_INTENT:
        // Hand back whatever action they requested - this can be changed to Intents.Scan.ACTION
        // when
        // the deprecated intent is retired.
        Intent intent = new Intent(getIntent().getAction());
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
        intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString());
        byte[] rawBytes = rawResult.getRawBytes();
        if (rawBytes != null && rawBytes.length > 0) {
          intent.putExtra(Intents.Scan.RESULT_BYTES, rawBytes);
        }
        Map<ResultMetadataType, ?> metadata = rawResult.getResultMetadata();
        if (metadata != null) {
          if (metadata.containsKey(ResultMetadataType.UPC_EAN_EXTENSION)) {
            intent.putExtra(Intents.Scan.RESULT_UPC_EAN_EXTENSION,
                    metadata.get(ResultMetadataType.UPC_EAN_EXTENSION).toString());
          }
          Number orientation = (Number) metadata.get(ResultMetadataType.ORIENTATION);
          if (orientation != null) {
            intent.putExtra(Intents.Scan.RESULT_ORIENTATION, orientation.intValue());
          }
          String ecLevel = (String) metadata.get(ResultMetadataType.ERROR_CORRECTION_LEVEL);
          if (ecLevel != null) {
            intent.putExtra(Intents.Scan.RESULT_ERROR_CORRECTION_LEVEL, ecLevel);
          }
          @SuppressWarnings("unchecked")
          Iterable<byte[]> byteSegments =
                  (Iterable<byte[]>) metadata.get(ResultMetadataType.BYTE_SEGMENTS);
          if (byteSegments != null) {
            int i = 0;
            for (byte[] byteSegment : byteSegments) {
              intent.putExtra(Intents.Scan.RESULT_BYTE_SEGMENTS_PREFIX + i, byteSegment);
              i++;
            }
          }
        }
        sendReplyMessage(R.id.return_scan_result, intent, resultDurationMS);
        break;

      case PRODUCT_SEARCH_LINK:
        // Reformulate the URL which triggered us into a query, so that the request goes to the same
        // TLD as the scan URL.
        int end = sourceUrl.lastIndexOf("/scan");
        String productReplyURL = sourceUrl.substring(0, end) + "?q="
                + resultHandler.getDisplayContents() + "&source=zxing";
        sendReplyMessage(R.id.launch_product_query, productReplyURL, resultDurationMS);
        break;
      default:
        break;
    }
  }

  private void sendReplyMessage(int id, Object arg, long delayMS) {
    if (handler != null) {
      Message message = Message.obtain(handler, id, arg);
      if (delayMS > 0L) {
        handler.sendMessageDelayed(message, delayMS);
      } else {
        handler.sendMessage(message);
      }
    }
  }

  private void initCamera(SurfaceHolder surfaceHolder) {
    if (surfaceHolder == null) {
      throw new IllegalStateException("No SurfaceHolder provided");
    }
    if (cameraManager.isOpen()) {
      Log.w(TAG, "initCamera() while already open -- late SurfaceView callback?");
      return;
    }
    try {
      cameraManager.openDriver(surfaceHolder);
      // Creating the handler starts the preview, which can also throw a RuntimeException.
      if (handler == null) {
        handler = new CaptureActivityHandler(this, decodeFormats, decodeHints, characterSet,
            cameraManager);
      }
      decodeOrStoreSavedBitmap(null, null);
    } catch (IOException ioe) {
      Log.w(TAG, ioe);
      displayFrameworkBugMessageAndExit();
    } catch (RuntimeException e) {
      // Barcode Scanner has seen crashes in the wild of this variety:
      // java.?lang.?RuntimeException: Fail to connect to camera service
      Log.w(TAG, "Unexpected error initializing camera", e);
      displayFrameworkBugMessageAndExit();
    }
  }

  private void displayFrameworkBugMessageAndExit() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle(getString(R.string.app_name));
    builder.setMessage(getString(R.string.msg_camera_framework_bug));
    builder.setPositiveButton(R.string.button_ok, new FinishListener(this));
    builder.setOnCancelListener(new FinishListener(this));
    builder.show();
  }

  public void restartPreviewAfterDelay(long delayMS) {
    if (handler != null) {
      handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
    }
  }


  public void drawViewfinder() {
    viewfinderView.drawViewfinder();
  }

}
